/Engine/Source/Runtime/HeadMountedDisplay/Public/IXRTrackingSystem.h
Get the transform of the specified tracking origin, if available.
virtual bool GetTrackingOriginTransform ( [TEnumAsByte](API\Runtime\Core\Containers\TEnumAsByte)< [EHMDTrackingOrigin::Type](API\Runtime\HeadMountedDisplay\EHMDTrackingOrigin__Type) > Origin, FTransform & OutTransform ) const